function loader(inputSource){
    //console.log('index');//loader3//loader2//loader1
    console.log('loader3')
   return inputSource+'//loader3';
}
loader.pitch = function(remindingReqeust,previousRequest,data){
 console.log('pitch3');

}
//默认情况下loader得到的内容是字符串，如果 你想得到二进制文件，需要把raw=true
loader.raw = true;
module.exports = loader;